SALT LAKE CITY (AP) — A 5.7-magnitude earthquake shook Salt Lake City and its suburbs early Wednesday, sending spooked residents fleeing their homes, knocking out power for tens of thousands and closing the city’s airport.

The epicenter was just southwest of Salt Lake City and about 2.8 million in the state probably felt the quake, the U.S. Geological Survey reported.

There were no initial reports of major damage to buildings or injuries, said Utah Emergency Management spokesman Joe Dougherty.

Operations at Salt Lake City International Airport came to a halt and the control tower and concourses were evacuated, the airport tweeted. The quake also shut down the light rail service for Salt Lake City and its suburbs.

Residents reported feeling shaking across a 100-mile (160 kilometer) area, with the heaviest impact in Salt Lake County, officials said.

Some residents ran from their homes and into the streets as they felt the earthquake shake buildings for 10 to 15 seconds.

The quake knocked pictures from walls and dishes from shelves, and people reported feeling it in the neighboring states of Colorado, Idaho, Wyoming and Nevada. Gov. Gary Herbert warned people to stay away from downtown Salt Lake City while officials assess damage.